fix(windows): use cross-env for environment variables and fix build script

[reshadat]

Description:

This pull request resolves issues that prevented the application from building and running on Windows
environments.

Changes

• Integrated cross-env: The start:http script now uses cross-env to set environment variables, ensuring it
  works across different platforms.
  These changes ensure a smoother development experience for Windows users and improve the overall
  cross-platform compatibility of the project.

How to Test

1. On a Windows machine, run npm install to add the cross-env dependency.